InGenius High-CMRR Balanced Input Line Receiver ICs THAT 1200, 1203, 1206 FEATURES APPLICATIONS High CMRR: typ. 90 dB at 60 Hz Balanced Audio Line Receivers Extremely high common-mode input impedance Instrumentation Amplifiers Maintains balance under real-world conditions Transformer-like performance in an IC Differential Amplifiers Excellent audio performance Wide bandwidth: typ. > 22 MHz Transformer Front-End Replacements High slew rate: typ. 12 V/us Low distortion: typ. 0.0005 % THD ADC Front-Ends Low noise: typ. -106 dBu Several gains: 0 dB, -3 dB, & -6 dB Description The THAT 1200-series InGenius balanced Developed by Bill Whitlock of Jensen Trans- line receivers overcome a serious limitation of formers, the patented InGenius input stage uses conventional balanced input stages: poor com- clever bootstrapping to raise its common-mode mon mode rejection in real-world applications. input impedance into the megohm range without While conventional input stages measure well in the noise penalty from the obvious solution of the lab and perform well on paper, they fail to using high-valued resistors. Like transformers, live up to their CMRR specs when fed from even InGenius line receivers maintain their high slightly unbalanced source impedances a CMRR over a wide range of source impedance common situation in almost any pro sound envi- imbalances even when fed from single-ended ronment. This is because conventional stages sources. But unlike transformers, these wide have low common-mode input impedance, which bandwidth solid state devices offer dc-coupling, interacts with imbalances in source impedance to low distortion, and transparent sound in a small unbalance common-mode signals, making them package at reasonable cost. indistinguishable from desired, balanced signals. Pin Name DIP Pin SO Pin OA1 R6 R1 R2 Ref 1 1 IN- +1 Vcc In- 2 2 R10 R7 Vee 24K OA4 OA3 In+ 3 3 - +1 Vout + Vee 4 4 R11 R8 CM In 5 5 24K R3 R4 IN+ +1 Vout 6 6 R9 OA2 REF R5 Vcc 7 7 24K CM Out 8 8 CM IN CM OUT Table 1. 1200-series pin assignments Cb Gain Plastic DIP Plastic SO R6 , R9 R7 , R8 R1 , R3 R2 , R4 Part no. 0 dB 1200P 1200S THAT1200 0 24 k 6 k 6 k THAT1203 7 k 17 k 6 k 6 k -3 dB 1203P 1203S THAT1206 7 k 17 k 7 k 5 k -6 dB 1206P 1206S Figure 1. THAT 1200-series equivalent circuit diagram Table 2. Ordering information Protected under U.S. Patent Numbers, 5,568,561 and 6,160,451. Additional patents pending. InGenius is a registered trademark of THAT Corporation. THAT Corporation 45 Sumner Street Milford, Massachusetts 01757-1656 USA Tel: +1 508 478-9200 Fax +1 508 478-0990 Web: www.thatcorp.com Copyright 2017, THAT Corporation All rights reserved Doc 600033 Rev 01 InGenius High-CMRR Page 2 of 12 Document 600033 Rev 01 Balanced Input Line Receiver ICs 1 SPECIFICATIONS Absolute Maximum Ratings (T = 25C) A Positive Supply Voltage (V ) +20 V Output Short-Circuit Duration (t ) Continuous CC SH Negative Supply Voltage (V ) -20 V Operating Temperature Range (T ) 0 to +85 C EE OP Storage Temperature Range (T ) -40 to +125 C Junction Temperature (T ) 125 C ST J THAT1200 THAT1203 THAT1206 Input Voltage (V ) 25 V 31 V 31 V IN 2 ,3 ,4 Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Supply Current I No Signal 4.7 8.0 mA CC Supply Voltage V , V 3 18 V CC EE Input Bias Current IB No signal Either input 700 1,400 nA connected to GND Input Offset Current I No signal 300 nA B-OFF Input Voltage Range V Common mode 12.5 13.0 V IN-CM V Differential (equal and opposite swing) IN-DIFF THAT 1200 21.0 21.5 dBu THAT 1203 24.0 24.5 dBu THAT 1206 24.0 24.5 dBu Input Impedance Z Differential 48.0 k IN-DIFF Z Common mode with bootstrap IN-CM 60 Hz 10.0 M 20 kHz 3.2 M Common Mode Rejection Ratio CMRR Matched source impedances V = 10V 1 CM DC 70 90 dB 60 Hz 70 90 dB 20 kHz 85 dB 5 Common Mode Rejection Ratio CMRR 10 unmatched source impedances V = 10V IEC CM DC 90 dB 60 Hz 90 dB 20 kHz 85 dB Common Mode Rejection Ratio CMRR 600 unmatched source impedances V = 10V 2 CM 60 Hz 70 dB 20 kHz 65 dB 6 Power Supply Rejection Ratio PSRR At 60 Hz, with V = -V CC EE THAT 1200 82 dB THAT 1203 80 dB THAT 1206 80 dB 1 5 All specifications subject to change without notice. Per IEC Standard 60268-3 for testing CMRR of balanced 2 Unless otherwise noted, T = 25C, V = +15V, V = -15V inputs. A CC EE 3 6 See test circuit in Figure 2. Defined with respect to differential gain. 4 0 dBu = 0.775 Vrms THAT Corporation 45 Sumner Street Milford, Massachusetts 01757-1656 USA Tel: +1 508 478-9200 Fax +1 508 478-0990 Web: www.thatcorp.com Copyright 2017, THAT Corporation All rights reserved.